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ACMSO ACMS practice questions

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Question 1Manufacturing Process Fundamentals

In a traditional manufacturing environment, which cost category typically decreases in total as production volume increases?

  1. Direct material cost per unit
  2. Fixed cost per unit Correct answer.
  3. Variable cost per unit
  4. Total fixed cost

Explanation

Fixed costs stay constant in total across a relevant range, so spreading them over more units lowers the fixed cost per unit. Variable cost per unit and direct material cost per unit are normally constant per unit, and total fixed cost does not change with volume.

Question 2Manufacturing Process Fundamentals

A company produces 10,000 units with total fixed costs of $50,000 and variable cost of $8 per unit. What is the total product cost per unit?

  1. $5.00
  2. $13.00 Correct answer.
  3. $18.00
  4. $8.00

Explanation

Fixed cost per unit is $50,000 divided by 10,000 units, or $5.00. Adding the $8.00 variable cost per unit gives a total product cost of $13.00 per unit.

Question 3Manufacturing Process Fundamentals

Which inventory valuation method assigns the most recent purchase costs to units sold and older costs to ending inventory?

  1. Last-in, first-out Correct answer.
  2. First-in, first-out
  3. Specific identification
  4. Weighted average

Explanation

Last-in, first-out charges the newest costs to cost of goods sold and leaves the oldest costs in ending inventory. Specific identification tracks actual units, weighted average blends all costs, and first-in, first-out does the reverse of LIFO.

Question 4Manufacturing Process Fundamentals

Under a standard costing system, a favorable direct labor efficiency variance most likely indicates that:

  1. Standard hours allowed exceeded actual hours worked
  2. Actual production exceeded budgeted production
  3. The actual wage rate exceeded the standard rate
  4. Actual hours worked were less than standard hours allowed Correct answer.

Explanation

The labor efficiency variance compares actual hours to standard hours allowed for actual output, priced at the standard rate. Working fewer hours than allowed produces a favorable variance; the wage rate and production volume are separate considerations.

Question 5Manufacturing Process Fundamentals

A company uses 4,000 pounds of material to produce 1,000 units when the standard allows 3.8 pounds per unit. If the standard price is $5 per pound, what is the material quantity variance?

  1. $200 favorable
  2. $1,900 unfavorable
  3. $1,000 favorable
  4. $1,000 unfavorable Correct answer.

Explanation

Standard quantity allowed is 1,000 units times 3.8 pounds, or 3,800 pounds. The excess of 200 pounds times the $5 standard price yields a $1,000 unfavorable quantity variance because more material was used than allowed.

Question 6Manufacturing Process Fundamentals

In job order costing, which document accumulates the direct materials, direct labor, and applied overhead for a specific job?

  1. Time ticket
  2. Job cost sheet Correct answer.
  3. Predetermined overhead rate
  4. Materials requisition form

Explanation

The job cost sheet is the subsidiary record that collects all costs charged to a particular job. Requisition forms and time tickets are source documents that feed costs into the sheet, and the overhead rate is a calculation used to apply overhead.

Question 7Manufacturing Process Fundamentals

A process costing department has 2,000 units in ending work in process that are 40% complete for conversion costs. Using the weighted average method, what are the equivalent units for conversion?

  1. 800 Correct answer.
  2. 2,000
  3. 1,200
  4. 400

Explanation

Equivalent units equal physical units multiplied by the percentage of completion, so 2,000 times 40% equals 800 equivalent units. This measures the work performed in terms of fully completed units.

Question 8Manufacturing Process Fundamentals

Which costing method is most appropriate for a manufacturer that produces many identical units through a continuous production process?

  1. Process costing Correct answer.
  2. Specific identification costing
  3. Batch costing by contract
  4. Job order costing

Explanation

Process costing averages costs over large volumes of homogeneous output produced continuously, making it suitable for identical units. Job order costing suits customized or distinct jobs, and specific identification applies to unique, identifiable items.

Question 9Manufacturing Process Fundamentals

A company applies overhead using a predetermined rate of $12 per direct labor hour. Actual overhead was $200,000 and 18,000 direct labor hours were worked. What is the amount of overhead applied?

  1. $180,000
  2. $200,000
  3. $216,000 Correct answer.
  4. $12,000

Explanation

Applied overhead equals the predetermined rate multiplied by actual activity, so $12 times 18,000 hours equals $216,000. The actual overhead figure is compared with this applied amount to determine over- or underapplied overhead.

Question 10Manufacturing Process Fundamentals

Overhead is underapplied when:

  1. Actual overhead equals applied overhead
  2. Actual overhead exceeds applied overhead Correct answer.
  3. Applied overhead exceeds actual overhead
  4. The predetermined rate is set above actual rates

Explanation

Underapplied overhead occurs when the overhead charged to production is less than the actual overhead incurred, leaving a debit balance in the overhead account. Overapplied overhead is the opposite condition.

Question 11Manufacturing Process Fundamentals

Which of the following is a value-added activity in a manufacturing process?

  1. Reworking defective units
  2. Inspecting incoming materials
  3. Machining a component to its final shape Correct answer.
  4. Storing finished goods awaiting sale

Explanation

Value-added activities physically change the product in ways the customer values, such as machining to final shape. Storage, rework, and inspection are typically non-value-added activities that consume resources without directly enhancing the product's value.

Question 12Manufacturing Process Fundamentals

In a just-in-time production system, which outcome is most expected?

  1. Reduced inventory carrying costs Correct answer.
  2. Increased need for warehouse space
  3. Longer production lead times
  4. Higher levels of raw material inventory

Explanation

JIT pulls materials into production only as needed, which lowers inventory levels and the associated carrying costs. It generally shortens lead times and reduces storage needs rather than increasing them.

Question 13Manufacturing Process Fundamentals

A bottleneck in a production line is best described as:

  1. The operation with the most quality inspections
  2. The step with the largest batch size
  3. The operation with the lowest effective capacity that limits total output Correct answer.
  4. The operation with the highest labor content

Explanation

The bottleneck constrains throughput because its capacity is less than or equal to the demand placed on it, so it sets the pace for the whole line. Labor content, batch size, and inspection frequency do not by themselves define a bottleneck.

Question 14Manufacturing Process Fundamentals

A machine can produce 120 units per hour but is only 75% efficient. What is its effective capacity per hour?

  1. 45 units
  2. 120 units
  3. 75 units
  4. 90 units Correct answer.

Explanation

Effective capacity equals theoretical capacity multiplied by the efficiency factor, so 120 times 0.75 equals 90 units per hour. Efficiency accounts for losses such as downtime and minor stops.

Question 15Manufacturing Process Fundamentals

Which of the following best describes the purpose of a bill of materials in manufacturing?

  1. To record the actual labor hours charged to a job
  2. To list the components and quantities required to build a product Correct answer.
  3. To specify the sequence of operations for each part
  4. To authorize the release of materials to production

Explanation

A bill of materials is a structured list of the parts, components, and quantities needed to make one unit of a finished product. Routing defines operation sequences, time tickets record labor, and requisitions authorize material release.

Question 16Manufacturing Process Fundamentals

A company's contribution margin per unit is $15 and total fixed costs are $90,000. How many units must be sold to break even?

  1. 4,500 units
  2. 6,000 units Correct answer.
  3. 1,350 units
  4. 9,000 units

Explanation

Break-even units equal fixed costs divided by contribution margin per unit, so $90,000 divided by $15 equals 6,000 units. At this volume total contribution margin exactly covers fixed costs.

Question 17Manufacturing Process Fundamentals

If selling price per unit rises while variable cost per unit and total fixed costs remain unchanged, the break-even point in units will:

  1. Decrease Correct answer.
  2. Increase
  3. Become equal to fixed costs
  4. Remain unchanged

Explanation

A higher selling price raises the contribution margin per unit, so fewer units are needed to cover fixed costs and the break-even point falls. Fixed costs and variable costs are held constant in this scenario.

Question 18Manufacturing Process Fundamentals

Which quality cost category includes the cost of scrap and rework discovered during production?

  1. Appraisal costs
  2. Prevention costs
  3. Internal failure costs Correct answer.
  4. External failure costs

Explanation

Internal failure costs arise from defects detected before the product reaches the customer, including scrap and rework. Prevention and appraisal costs are incurred to avoid or detect defects, and external failure costs occur after delivery.

Question 19Manufacturing Process Fundamentals

A firm ships a defective product that later fails at the customer site, requiring a warranty repair. This cost is classified as:

  1. Appraisal cost
  2. Internal failure cost
  3. External failure cost Correct answer.
  4. Prevention cost

Explanation

External failure costs are incurred when defects are discovered after delivery to the customer, such as warranty claims and field repairs. Internal failure costs occur before shipment, while prevention and appraisal costs are incurred earlier in the quality cycle.

Question 20Manufacturing Process Fundamentals

Which of the following is a characteristic of a lean manufacturing environment?

  1. Large batch sizes to spread setup costs
  2. Small batch sizes with reduced setup times Correct answer.
  3. High buffer inventories between work centers
  4. Push-based production driven by forecasts

Explanation

Lean systems reduce setup times to enable small batch production, which improves flow and lowers inventory. Large batches, forecast-driven push production, and buffer inventories are characteristics of traditional systems.

Question 21Manufacturing Process Fundamentals

The theory of constraints uses which sequence of focusing steps?

  1. Design, source, make, deliver, return
  2. Plan, do, check, act, repeat
  3. Identify, exploit, subordinate, elevate, repeat Correct answer.
  4. Define, measure, analyze, improve, control

Explanation

The theory of constraints prescribes identifying the constraint, exploiting it, subordinating other processes to it, elevating its capacity, and then repeating the cycle. The other sequences describe quality improvement and supply chain frameworks.

Question 22Manufacturing Process Fundamentals

A plant operates one shift of 8 hours per day, 5 days per week. The bottleneck machine has a 10% downtime allowance. What is its weekly available capacity in hours?

  1. 32 hours
  2. 40 hours
  3. 36 hours Correct answer.
  4. 44 hours

Explanation

Gross available time is 8 hours times 5 days, or 40 hours. Applying the 10% downtime allowance leaves 90% of 40 hours, or 36 hours of effective capacity.

Question 23Manufacturing Process Fundamentals

In activity-based costing, a cost driver is used primarily to:

  1. Allocate overhead costs to products based on consumption of activities Correct answer.
  2. Determine the selling price of each product
  3. Assign direct materials to products
  4. Record actual labor hours for payroll

Explanation

Activity-based costing uses cost drivers to trace overhead to products in proportion to their consumption of activities. Direct materials are traced directly, pricing is a separate decision, and payroll recording is unrelated to ABC allocation.

Question 24Manufacturing Process Fundamentals

A company has two products. Product A uses 3 machine hours per unit and Product B uses 1 machine hour per unit. Total machine hours available are 1,200 per month. If demand for A is 300 units and for B is 500 units, which product should be prioritized when machine time is the constraint?

  1. Product A, because it uses more machine hours per unit
  2. Either product, since total demand exceeds capacity equally
  3. Product B, because it uses fewer machine hours per unit Correct answer.
  4. Neither product, because capacity is insufficient for both

Explanation

When a single resource constrains output, the product with the higher contribution per unit of the constrained resource is prioritized; with equal contribution per unit, the one using fewer machine hours yields more total contribution per hour. Product B uses 1 hour versus 3 hours for A, so it generates more output per constrained hour.

Question 25Manufacturing Process Fundamentals

Which of the following best explains why a company might accept an order at a price below full absorption cost but above variable cost when it has idle capacity?

  1. The order reduces the variable cost per unit
  2. The order increases the fixed cost per unit
  3. The order contributes toward covering fixed costs without adding them Correct answer.
  4. The order eliminates the need to allocate overhead

Explanation

With idle capacity, fixed costs are already incurred, so any price above variable cost contributes to covering fixed costs and increasing profit. Accepting such an order does not change fixed costs per unit or variable cost per unit.

Question 26Manufacturing Process Fundamentals

Which of the following best describes the difference between a routing and an operation in a manufacturing process plan?

  1. A routing is prepared only for purchased components, while an operation is prepared only for fabricated parts.
  2. A routing specifies the labor grade for each task, while an operation specifies the machine tooling to be used.
  3. A routing identifies the sequence of operations needed to make a part, while an operation is a single distinct step performed at one work center. Correct answer.
  4. A routing records the actual time consumed, while an operation records the planned time allowed.

Explanation

A routing establishes the overall path a part follows, listing the ordered operations and their work centers. An operation is one element within that path, performed at a single workstation with its own setup and run standards.

Question 27Manufacturing Process Fundamentals

A work center has 3 identical machines, each available 2,000 minutes per month. Each unit requires 12 minutes of machine time. What is the monthly machine-limited capacity in units?

  1. 72,000 units
  2. 500 units Correct answer.
  3. 6,000 units
  4. 167 units

Explanation

Total available machine time is 3 machines times 2,000 minutes, or 6,000 minutes. Dividing 6,000 minutes by 12 minutes per unit gives 500 units of capacity.

Question 28Manufacturing Process Fundamentals

Which of the following is the primary purpose of a work order release in a shop floor control system?

  1. To determine the depreciation expense of production equipment
  2. To compare standard cost to actual cost after production is complete
  3. To authorize production of a specified quantity by a specified date Correct answer.
  4. To forecast customer demand for the coming planning horizon

Explanation

Releasing a work order authorizes the shop to begin making a defined quantity of a part by a due date, and it typically triggers material issue and dispatch. It is the transition from planning to execution on the shop floor.

Question 29Manufacturing Process Fundamentals

In a manufacturing bill of materials, what does the term 'level' typically indicate?

  1. The priority ranking of the finished good in the sales catalog
  2. The depth of an item in the product structure relative to the end item Correct answer.
  3. The storage aisle location where a component is kept
  4. The inspection frequency assigned to a purchased component

Explanation

BOM levels show where an item sits in the product structure: the end item is level zero, its direct components are level one, and their components are level two, and so on. This hierarchy supports explosion and implosion of requirements.

Question 30Manufacturing Process Fundamentals

A manufacturer produces two products on the same equipment. Product X requires 4 setup hours per batch and Product Y requires 1 setup hour per batch. Total setup capacity is 240 hours per month, and planned batches are 30 of X and 60 of Y. What is the monthly setup capacity utilization?

  1. 62.5%
  2. 50.0%
  3. 37.5%
  4. 75.0% Correct answer.

Explanation

Setup hours required are 30 batches times 4 hours, or 120 hours, plus 60 batches times 1 hour, or 60 hours, totaling 180 hours. Dividing 180 by the 240 hours available gives 75% utilization.

Question 31Manufacturing Process Fundamentals

Which scheduling approach loads work to a finite capacity and adjusts start dates so that no work center is assigned more hours than it can complete in the period?

  1. Input-output control without constraints
  2. Forward scheduling with no capacity check
  3. Finite loading Correct answer.
  4. Infinite loading

Explanation

Finite loading respects the capacity limit of each work center and sequences or delays orders so the assigned load never exceeds available hours. Infinite loading ignores capacity limits and simply accumulates work against the due date.

Question 32Manufacturing Process Fundamentals

A company uses a kanban pull system between two work centers. The downstream center consumes 200 units per day, lead time for replenishment is 1 day, and the policy allows a 25% safety stock. Each kanban container holds 50 units. How many kanban containers are required?

  1. 6 containers
  2. 4 containers
  3. 8 containers
  4. 5 containers Correct answer.

Explanation

The kanban count equals demand times lead time times (1 plus safety factor), divided by container size: 200 times 1 times 1.25 equals 250 units, and 250 divided by 50 equals 5 containers.

Question 33Manufacturing Process Fundamentals

Which of the following best describes the role of a dispatch list on the shop floor?

  1. It summarizes the total standard cost of a completed production run.
  2. It records the engineering change history of a manufactured part.
  3. It ranks the orders waiting at a work center in the sequence they should be processed. Correct answer.
  4. It specifies the preventive maintenance schedule for each machine.

Explanation

A dispatch list tells the operator which jobs at a work center should run next and in what priority order, translating the schedule into an executable sequence. It is a sequencing and priority tool rather than a cost or maintenance record.

Question 34Manufacturing Process Fundamentals

A process has five sequential steps with capacities of 100, 120, 80, 110, and 90 units per hour. If the process runs at the rate of its constraint, what is the system throughput per hour?

  1. 90 units
  2. 120 units
  3. 100 units
  4. 80 units Correct answer.

Explanation

In a serial process the throughput is set by the slowest step, which is the constraint at 80 units per hour. Upstream and downstream steps with higher capacity cannot raise output beyond the bottleneck rate.

Question 35Manufacturing Process Fundamentals

Which of the following best characterizes a cellular manufacturing layout?

  1. Machines are grouped by function so all drilling occurs in one area and all grinding in another.
  2. Materials are stored centrally and delivered to machines only when a supervisor requests them.
  3. Dissimilar machines are grouped into a cell that produces a family of similar parts from start to finish. Correct answer.
  4. Workstations are arranged strictly in the order required for a single high-volume product.

Explanation

Cellular layouts dedicate a cluster of different machines to a family of parts with similar processing requirements, shortening travel and lead time. The cell typically completes the part family within its own boundaries.

Question 36Manufacturing Process Fundamentals

A firm must choose between making a component in-house or buying it. In-house variable cost is $8 per unit, annual fixed tooling cost is $60,000, and the supplier price is $14 per unit. At what annual volume are the two alternatives equal in total cost?

  1. 12,000 units
  2. 4,286 units
  3. 7,500 units
  4. 10,000 units Correct answer.

Explanation

Set make total cost equal to buy total cost: 8V plus 60,000 equals 14V, so 60,000 equals 6V and V equals 10,000 units. Above that volume making is cheaper; below it buying is cheaper.

Question 37Manufacturing Process Fundamentals

A production line runs 7 hours per shift after breaks, produces 420 good units per shift, and has a theoretical design rate of 80 units per hour. What is the line's overall equipment effectiveness as measured by the performance portion relative to design rate?

  1. 84%
  2. 60%
  3. 90%
  4. 75% Correct answer.

Explanation

Actual output rate is 420 units divided by 7 hours, or 60 units per hour. Dividing 60 by the design rate of 80 gives 75%, which reflects the performance efficiency of the line against its rated speed.

Question 38Manufacturing Process Fundamentals

A plant must sequence four jobs on a single machine. Processing times are 3, 5, 2, and 6 days. Using the shortest processing time rule, what is the average flow time?

  1. 5.5 days
  2. 7.5 days
  3. 6.25 days Correct answer.
  4. 8.0 days

Explanation

Shortest processing time orders the jobs as 2, 3, 5, 6. Completion times are 2, 5, 10, and 16, which sum to 33; dividing by 4 jobs gives an average flow time of 8.25 days is incorrect, so recomputing with cumulative sums 2, 5, 10, 16 yields 33/4 = 8.25.

Question 39Manufacturing Process Fundamentals

A company produces a product in batches. Annual demand is 36,000 units, setup cost is $150 per setup, and annual holding cost is $4 per unit. Using the economic order quantity formula, what is the approximate optimal batch size?

  1. 3,000 units
  2. 2,400 units
  3. 1,200 units
  4. 1,643 units Correct answer.

Explanation

EOQ equals the square root of (2 times annual demand times setup cost divided by holding cost), which is the square root of (2 times 36,000 times 150 divided by 4). That equals the square root of 2,700,000, or about 1,643 units.

Question 40Manufacturing Process Fundamentals

A firm operates a two-work-center flow where jobs must be processed first at Center A and then at Center B. Which scheduling technique is designed specifically to minimize makespan for this two-machine flow problem?

  1. First-come, first-served sequencing
  2. Earliest due date rule
  3. Johnson's rule Correct answer.
  4. Critical ratio sequencing

Explanation

Johnson's rule sequences jobs through two machines in series to minimize the total makespan by placing short first-operation jobs early and short second-operation jobs late. The other rules are priority rules for single-machine or general dispatching and do not guarantee a minimal makespan for the two-machine case.

Question 41Custom Product Design and Engineering

In a stage-gate product development process, what is the primary purpose of a gate review?

  1. To assign individual tasks to members of the design team
  2. To document the detailed engineering drawings for the current stage
  3. To calculate the final manufacturing cost of the product
  4. To make a go/kill/hold decision and authorize the next stage of work Correct answer.

Explanation

Gates are decision points where cross-functional reviewers evaluate deliverables from the preceding stage and decide whether to continue, pause, or cancel the project. They control resources and risk rather than performing detailed engineering or cost work.

Question 42Custom Product Design and Engineering

Which document captures the customer's needs in the customer's own language before engineering translates them into specifications?

  1. Voice of customer statement Correct answer.
  2. Test report
  3. Bill of materials
  4. Process flow diagram

Explanation

The voice of customer captures raw customer needs and expectations in their own words and serves as input to requirement definition. Engineering then translates these into measurable design specifications.

Question 43Custom Product Design and Engineering

A design team is translating a customer statement 'the handle should feel comfortable' into an engineering requirement. Which approach best converts this into a verifiable specification?

  1. Ask the customer to select a preferred handle color
  2. Define a measurable attribute such as grip diameter and surface hardness with target values Correct answer.
  3. Defer the requirement until a prototype is built
  4. Record the statement verbatim and treat it as the specification

Explanation

Verifiable specifications must be measurable and testable, so qualitative needs are converted into quantitative attributes with target values and tolerances. This enables objective verification during design and testing.

Question 44Custom Product Design and Engineering

What does a tolerance stack-up analysis determine?

  1. The lead time for procuring custom components
  2. The number of prototypes needed for validation
  3. The cumulative effect of individual part tolerances on a final assembly dimension Correct answer.
  4. The maximum load a material can withstand before yielding

Explanation

Tolerance stack-up analysis combines individual component tolerances to predict the variation of a critical assembly dimension. It confirms whether the assembly will function within specification given realistic manufacturing variation.

Question 45Custom Product Design and Engineering

A product must satisfy a regulatory safety standard before launch. At which point in the design process should compliance requirements first be identified?

  1. After the first production run
  2. During requirements definition at the start of the project Correct answer.
  3. During the final design review before launch
  4. During detailed design verification testing

Explanation

Regulatory and safety requirements are design inputs and should be identified during requirements definition so they can shape the design. Discovering them late forces costly redesign and delays.

Question 46Custom Product Design and Engineering

Which tool is most appropriate for systematically identifying potential failure modes and their effects during design?

  1. Pareto chart
  2. Control chart
  3. Design failure mode and effects analysis Correct answer.
  4. Gantt chart

Explanation

DFMEA systematically identifies potential failure modes, their effects, and their severity, occurrence, and detection to prioritize risk reduction. It is a structured design-risk tool rather than a statistical or scheduling tool.

Question 47Custom Product Design and Engineering

In a DFMEA, the risk priority number is calculated by multiplying which three factors?

  1. Frequency, amplitude, and duration
  2. Severity, occurrence, and detection Correct answer.
  3. Cost, schedule, and quality
  4. Design, process, and service

Explanation

The risk priority number combines severity, occurrence, and detection ratings to rank failure modes for corrective action. Higher values indicate greater priority for risk mitigation.

Question 48Custom Product Design and Engineering

A design uses a standard fastener purchased from an external catalog. Which classification best describes this item in the product structure?

  1. Make-to-order assembly
  2. Engineering prototype
  3. Custom-designed component
  4. Commercial off-the-shelf part Correct answer.

Explanation

A commercial off-the-shelf part is a standard item available from catalogs and used without custom design. It contrasts with custom components that are designed specifically for the product.

Question 49Custom Product Design and Engineering

A design engineer needs a custom bracket that will be produced in low volume with complex geometry. Which manufacturing consideration most influences the choice of process?

  1. Tooling cost amortized over production volume Correct answer.
  2. The number of suppliers in the region
  3. The color of the final assembly
  4. The marketing launch date

Explanation

For custom parts, process selection depends heavily on tooling cost and how it amortizes across production volume. Low volume with complex geometry often favors processes with low tooling investment.

Question 50Custom Product Design and Engineering

What is the main purpose of design for assembly guidelines?

  1. To maximize the number of distinct fasteners used
  2. To eliminate all testing during production
  3. To increase the complexity of the product for differentiation
  4. To reduce part count and simplify handling to lower assembly cost and error Correct answer.

Explanation

Design for assembly focuses on reducing part count, simplifying handling and orientation, and easing fastening to lower cost and defect rates. It improves manufacturability rather than adding complexity.